//===================================================================================
// Microsoft patterns & practices
// Composite Application Guidance for Windows Presentation Foundation and Silverlight
//===================================================================================
// Copyright (c) Microsoft Corporation.  All rights reserved.
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY
// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT
// LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE.
//===================================================================================
// The example companies, organizations, products, domain names,
// e-mail addresses, logos, people, places, and events depicted
// herein are fictitious.  No association with any real company,
// organization, product, domain name, email address, logo, person,
// places, or events is intended or should be inferred.
//===================================================================================
using System;

namespace Microsoft.Practices.Prism.Regions
{
	/// <summary>
	/// Identifies the view in a region that is the target of a navigation request.
	/// </summary>
	public interface IRegionNavigationContentLoader
	{
		/// <summary>
		/// Gets the content to which the navigation request represented by <paramref name="navigationContext"/> applies.
		/// </summary>
		/// <remarks>
		/// If none of the items in the region match the target of the navigation request, a new item
		/// will be created and added to the region.
		/// </remarks>
		/// <param name="region">The region.</param>
		/// <param name="navigationContext">The context representing the navigation request.</param>
		/// <returns>The item to be the target of the navigation request.</returns>
		/// <exception cref="InvalidOperationException">when a new item cannot be created for the navigation request.</exception>
		object LoadContent(IRegion region, NavigationContext navigationContext);
	}
}